Apparatus for detecting oversize defects in yarn

ABSTRACT

A DEVICE FOR DETECTING OVERSIZE DEFECTS IN YARNS OR FILAMENTS COMPRISING A SLOTTED FLEXIBLE GUIDE 12 HAVING A STRAIN GAUGE 19 MOUNTED THEREON. THE YARNS OR FILAMENTS 10 ARE PASSED THROUGH THE SLOT 11 AND A DEFECT IN THE YARNS OR FILAMENTS CAUSES THE GUIDE TO DEFLECT A DISTANCE ACCORDING TO THE SIZE OF THE DEFECT. THE DEFLECTION PRODUCES A SIGNAL FROM THE STRAIN GAUGE WHICH IS FED TO A DISCRIMINATOR THAT COMPARES THE MAGNITUDE OF THE SIGNAL WITH A PRESET LEVEL AND ELIMINATES SIGNALS FROM SMALL DEFECTS. THE DEVICE IS PARTICULARLY ADAPTABLE IN SOLVENT SPINNING OF SYNTHETIC FIBERS FOR DEFECTING OVERSIZE FILAMENTS, AND POLYMER DRIPS.

DEFENSIVE PUBLICATION UNITED STATES PATENT OFFICE Published at the request of the applicant or owner in accordance with the Notice of Dec. 16, 1969, 869 0.G. 687. The abstracts of Defensive Publication applications are identified by distinctly numbered series and are arranged chronologically. The heading of each abstract indicates the number of pages of specification, including claims and sheets of drawings contained in the application as originally filed. The files of these applications are available to the public for inspection and reproduction may be purchased for 30 cents a sheet.

Defensive Publication applications have not been examined as to th no assertion as to the novelty of the disclosed subject matter.

PUBLISHED MAY 4, 1971 T886,007 APPARATUS FOR DETECTING OVERSIZE DEFECTS IN YARN John Vipond Harvey, 36 Campbell Crescent; Bruce Alexander Robinson, 3 Holland Crescent; and John William Stassen, 155 Division St, all of Kingston,

Ontario, Canada Filed May 4, 1970, Ser. No. 34,167 Int. Cl. G01n 19/08 US. Cl. 73-160 2 Sheets Drawing. 6 Pages Specification e merits of alleged invention. The Patent Oflice makes A device for detecting oversize defects in yarns or filaments comprising a slotted flexible guide 12 having a strain gauge 19 mounted thereon. The yarns or filaments 10 are passed through the slot 11 and a defect in the yarns or filaments causes the guide to deflect a distance according to the size of the defect. The deflection produces a signal from the strain gauge which is fed to a discriminator that compares the magnitude of the signal with a preset level and eliminates signals from small defects. The device is particularly adaptable in solvent spinning of synthetic fibers for detecting oversize filaments, and polymer drips,

May 4, .1971

' Filed May 4, 1970 J. v. HARVEY ETAL T886,007

APPARATUS FOR DETECTING OVERSIZE DEFECTS YARN v 2 Sheets-Sheet l v INVENTORS JOHN VIPON HARVEY BRUCE ALEXANDER ROBINSON JOHN WILLIAM STASSEN ATTORNEY y 1 1 J. v. HARVEY ETAL T886,007

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LL 3 l 2 E 1 3 INVENTORS C! a 3 JOHN VIPOND HARVEY BRUCE ALEXANDER ROBINSON JOHN WILLIAM STASSEN ATTORNEY 

